Improvement in inks for printing protective tints on commercial blanks



are put upon the stone or other material by UNITED STATES PATENT OFFICE.

EDWARD MENDEL, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN INKS FOR PRINTING PROTECTIVE TINTS 0N COMMERCIAL BLANKS.

Specification forming part of Letters Patent No. January 216,625, dated June 17,1879; application filed 27, 1879.

To all whom it may concern:

Be it known that I, EDWARD MENDEL, of the city of Chicago, in the county of (look and State of Illinois, haveinvented certain new and useful Improvements in Ink for Printing Protective Tints on Commercial and other Blanks; and I hereby declare thet'ollowing to be afull, clear, and exact description of my invention, such as will enable others skilled in the art to make and use the same.

My invention consists in the ink which I employ for printing such protective tint, the ingredients of which are glyceriue, starch, zinc-white, and grape-sugar or glucose, combined with any suitable coloring-matter.

To enable others skilled in the art to which it appertains to make and use my invention, I will proceed to describe completely the pro cess by which I print the protective tint aforesaid.

The method which I employ for producing the plates from which the protective tint is printed is as follows: The designs or forms the ordinary transferring process. The stone or plate is then rolled up with-that is, passed over by-rollers coated with an ink composed of lamp-black, borax, bees-wax, and asphaltum, made up with ordinary printers varnish, this inkbeing repeatedly applied by means of the rollers alternately with sulphuric or nitric acid until an etching is completed and the plates ready for printing on any kind of cylinder-press.

The ink used for printing the work is produced, as above stated, by using color combined with glycerine, starch, zinc-white, and grape-sugar or glucose. I prefer to employ the following substances and proportions, viz: glycerine, five parts; grape-sugar, one part; starch, one part; French zinc-white, onepart.

French white, or French zinc-white, is the commercial name for the finest quality of zinc-white, which is manufactured in France.

four ingredients together mechanically, first melting the grape-sugar by means of moderate heat. I do not limit myself absolutely to the above proportions, since these may be varied considerably without materially ali'ecting the result. This mixture may be kept on hand in any required quantity, and portions of it, when needed, colored to suit the occasion.

For this purpose I use, by preference, the well known aniline coloring substances reduced to an impalpable powder, though I do not limit can possibly present itselt'to persons practiced in the art of mixing lithographic inks.

This composition constitutes an ink or dye perfectly free from grease, and subject to removal from the paper on which it is printed by the action of alkalies, acids, or even vater-in short by any substance whatsoever having a tendency to remove ink-lravin g the paper perfectly clean wherever the chemicals 7 used for the removal of ink have been applied. The tint, pattern, or design prevents alt tion also by mechanical erasure.

What I claim as new, and desire to secure by Letters Patent, is-

An ink composed of glycerinc starch, zincwhite, grape-sugar or glucose, and coloringmatter, substantially as described, for the pur- ,/pose set forth.

v EDWARD MENDEL. In presence of- THOS. 1?. POWER,

In making my ink I mix the above-named SAML. W. PEASE. 

